-68.62% is the change from 545 to 171
Calculation steps:
[( 171 - 545 ) ÷ 545] x 100 = -68.62%
Formula
Percentage change = [(171 - 545) / 545] x 100
Subtract the new number by the original number
171 - 545 = -374
-374 ÷ 545 = -0.6862385321100918
-0.6862385321100918 x 100 = -68.62%